[new] Compatibility with the single product block.
[new] Added several developer filters to support offloading generated images to a CDN.
[new] Added new logic and the `iconic_pc_disallowed_params` developer filter to strip unwanted parameters causing generated thumbnail images to break.
[update] Refactored caching implementation and introduced automatic cleanup of cached image files when the transients expire.
[update] Slight refactor to front-end JavaScript to improve compatibility...